T
H
E

E
L
E
M
E
N
T
S
Book II   Proposition 6
But the gnomon NOP and LG are
    the whole square CEFB, which is described on CD;

therefore
    the rectangle contained by AD, DB
together with
    the square on CB
is equal to
    the square on CD.

Being what it was required to prove.
Previous Page    Return to Propositions    Seq.8 Next: II.11